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Homework Help: Two point source

  1. Jun 1, 2016 #1
    1. The problem statement, all variables and given/known data
    Two point sources, S1 and S2, are vibrating in phase and produce waves with a wavelength of 2.5 m. The two waves overlap at a nodal point. Calculate the smallest corresponding difference in path length for this point.

    2. Relevant equations

    3. The attempt at a solution
    I really don't know how to start this question. How can I find the length when I am only given the wavelength
  2. jcsd
  3. Jun 1, 2016 #2
    What relevant equations do you think you would need?
  4. Jun 1, 2016 #3
    sinθn= (n-1/2) (λ/d) , honestly I really don't understand what this question is asking
    Last edited: Jun 1, 2016
  5. Jun 1, 2016 #4
    Do you know what sources are, nodal points and the paths from the sources to the point on the nodal line?
  6. Jun 1, 2016 #5
  7. Jun 1, 2016 #6
    There is a relationship which shows that the length of a line from a point on nodal line n, to source 1 and the length of another line from the same point on nodal line n, to source 2, when subtracted have a value dependent on the wavelength of the sources. Do you remember learning about path length difference?
  8. Jun 1, 2016 #7
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